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How To Produce SSP Fertilizer Pellets

Single Super Phosphate (SSP) is a widely used phosphorus fertilizer that provides essential nutrients to plants for healthy growth and development. It is produced through a chemical process that involves the reaction of phosphate rock with sulfuric acid. Here’s an overview of the manufacturing process of single super phosphate fertilizer:

SSP fertilizer production process
SSP fertilizer production process


  1. Raw Materials:

  • Phosphate Rock: The primary raw material used in SSP production is phosphate rock, which contains various forms of phosphorus. The quality and composition of phosphate rock affect the final product’s nutrient content.
  • Sulfuric Acid: Sulfuric acid is a key component in the manufacturing process. It is used to react with phosphate rock to produce the soluble phosphate compounds in SSP.
  1. Phosphate Rock Treatment:

Phosphate rock is finely ground to increase its surface area, which facilitates the chemical reaction with sulfuric acid.

  1. Acidulation Process:

The acidulation process of SSP fertilizer making involves the following steps:

  • Mixing: Finely ground phosphate rock is mixed with a controlled amount of sulfuric acid to create a slurry.
  • Reactor: The slurry is then introduced into a reactor vessel. The acid reacts with the phosphate rock to produce phosphoric acid and calcium sulfate (gypsum) as byproducts.
  • Reaction: The reaction takes place under controlled conditions of temperature and agitation. It results in suitable material for SSP fertilizer granules making.
  1. Granulation:

The liquid phosphoric acid solution obtained from the acidulation process can be further processed to produce SSP granules:

  • Neutralization: If necessary, the liquid phosphoric acid solution is neutralized using ammonia, which produces ammonium phosphate as an intermediate compound.
  • Granulation: Choose a suitable SSP fertilizer granulator to turn chemical powder into pellets. The neutralized solution or phosphoric acid is then sprayed onto a bed of recycled SSP particles or other suitable materials.  Click here to learn more.
  • Drying: The  SSP granules are dried to reduce moisture content and increase their stability.
Stainless steel pan granulator for small scale SSP fertilizer pellets making
Stainless steel pan granulator for small scale SSP fertilizer pellets making
  1. Screening and Packaging:

The dried SSP granules are screened to achieve the desired particle size distribution. The final product is then packaged in bags or bulk containers for distribution and sale.

Advantages of Single Super Phosphate:

  • Phosphorus Supply: SSP provides an immediate and sustained supply of phosphorus to plants, promoting root development, flowering, and fruiting.
  • Cost-Effective: SSP is relatively cost-effective compared to some other phosphate fertilizers.
  • pH Adjustment: SSP’s acidic nature can help in adjusting soil pH when needed.


  • The manufacturing process involves the use of sulfuric acid, which requires careful handling to ensure safety and environmental protection.
  • Quality control measures are crucial to ensure consistent nutrient content and granule characteristics in the final product.
  • Proper storage and transportation practices are essential to prevent moisture absorption, which can affect granule integrity.

Single Super Phosphate is a widely used fertilizer in agriculture, contributing to improved crop yields and nutrient balance in soils. If you want to learn more about it or need suitable equipment , you can visit